This widely circulated cross-section of the San Juan Basin has little relevancy to the Rio Chama Watershed.
Glaciation of the Chama Platform not only stripped off most oil & gas producing strata, but also flushed and eroded remaining strata REPEATEDLY with glacial melt.
Thus, dramatic differences between the San Juan Basin, with its bowl-shaped retention of water, and the glacial flume-like drainage of the Chama Platform are obvious.
Dark arrows illustrate hydrologic communication between and along specific formations in the San Juan Basin.
Flexure and fracturing of remaining strata to the east by sheer glacial weight probably aided faulting and flushing.